Terribly sorry about that! I meant to post those on the game's page-- I've updated it now!
Default controls are as follows:
D-Pad / WASD - Movement
A Button / Left Arrow - Shoot/Confirm (A button)
B Button / Up Arrow - Boost (B button)
Start / '1' Key - (Start)
Select / '5' Key - (Select)
I'll be updating the game in the future to allow for keyboard remapping, too.